147 citations · 398 across the 8 of their papers we have counts for
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Anharmonic Decay of Coherent Optical Phonons in Antimony
Muneaki Hase, Kiminori Ushida, Masahiro Kitajima
Anharmonic decay of coherent optical phonons in semimetal Sb has been investigated by using a femtosecond pump-probe technique. The coherent mode is observed in time domai…
The birth of a quasiparticle in Si observed in time-frequency space
Muneaki Hase, Masahiro Kitajima, Anca Monia Constantinescu +1
The concept of quasiparticles in solid-state physics is an extremely powerful way to describe complex many-body phenomena in terms of single particle excitations. Introducing a sim…
Effect of n- and p-type Doping on Coherent Phonons in GaN
Kunie Ishioka, Keiko Kato, Naoki Ohashi +3
Effect of doping on the carrier-phonon interaction in wurtzite GaN is investigated by pump-probe reflectivity measurements using 3.1 eV light in near resonance with the fundamental…
Forcibly driven coherent soft phonons in GeTe with intense THz-rate pump fields
Muneaki Hase, Masahiro Kitajima, Shin-ichi Nakashima +1
We propose an experimental technique to generate large amplitude coherent phonons with irradiation of THz-rate pump pulses and to study the dynamics of phase transition in GeTe fer…
Ultrafast Critical Dynamics of Ferroelectric Phase Transition in PbGeTe
Rong Lu, Muneaki Hase, Masahiro Kitajima +2
Transient responses of the electronic excitation and coherent soft phonon are investigated both above and below the ferroelectric phase transition temperature T in Pb…